PubMed Health⌕ Search

Biomedical subjects

M A Sokolov

Publications and source records attributed to M A Sokolov.

6 recordsLinked to original sources
PubMed2004

Dialectics and implications of natural neurotropic autoantibodies in neurological disease and rehabilitation.

The role of natural idiotypic (Id-Abs) and anti-idiotypic (AId-Abs) autoantibodies against neuroantigens observed in different neurological disorders is not fully understood. In particular, limited experimental evidence has been provided concerning the qualitative and quantitative serological response after acute injuries of the central nervous system or during chronic mental diseases. In this study, we analyzed the specific Id-Abs and AId-Abs serological reactivities against 4 neuro-antigens in a large population of patients with ischemic stroke, schizophrenia, as well as healthy individuals. Patients with ischemic stroke were tested at different time points following the acute stroke episode and a correlation was attempted between autoantibodies response and different patterns of functional recovery. Results showed variable and detectable Id-Abs and AId-Abs in different proportions of all three populations of subjects. Among patients with different functional recovery after ischemic stroke, a difference in time-related trends of Id-Abs and AId-Abs was encountered. Our observations suggest that changes in the production of natural neurotropic Abs may engender a positive homeostatic, beside a possible pathogenic effect, in specific neurological disorders.

Aged↗
PubMed2004

[Genetic variability of the nucleocapsid protein of the virus of the porcine reproductive and respiratory syndrome].

The porcine reproductive and respiratory syndrome (PRRS) is a contagious viral pathology caused by PRRS virus. There are 2 types of the above virus--the European and American ones. Distribution patterns of the PRRS virus were studied for Russia and Byelorussia. Above 700 porcine sera obtained from 32 households of 21 Russia's administrative regions and from 19 households of 6 Byelorussia's administrative regions were tested for presence of antibodies to the PRRS virus. Simultaneously, the samples were tested for virus presence by polymerase chain reaction (PCR). It was proven serologically that the PRRS virus is widespread in the territories of Russia and Byelorussia. Noteworthily, all field isolates found in Russia and Byelorussia belong to the European type. Not a single viral isolate of the American PRRS type was found. The nucleocapsid (N) recombinant protein was obtained on the basis of the Russian field isolate of the PRRS virus by using the E. coli. expression system. Finally, it was shown as possible to use the recombinant protein in indirect immune enzyme assay for the sake of detecting the antibodies to the PRRS virus.

Animals↗
PubMed1999

[Levels of neurotransmitter amino acids in the cerebrospinal fluid of patients with acute ischemic stroke].

The dynamics of the levels of both excitatory (aspartate, glutamate) and inhibitory (GABA, glycine) neurotransmitter amino acids was estimated in cerebrospinal fluid of 110 patients with hemispheric ischemic stroke. A significant increase of the contents of glutamate and aspartate was found beginning with the first 6 hours of the disease onset. The degree and duration of such elevation correlated with severity of the stroke. Maximal GABA and glycine levels were registered to the end of the 1st day of the stroke, that reflected delayed triggering of the protective inhibitory mechanisms. It was established that insufficiency of GABA-mediation in hemispherical location of the stroke was much responsible for both the severity of its clinical manifestations and potential of the restorative processes. Early significant biochemical criteria for objective assessment of the severity of cerebral ischemia as well as of the stroke course and outcome were defined. The most unfavourable prognostic signs were low GABA concentration (or impossibility of its evaluation) during the first days of the stroke, progredient elevation of the aspartate level until the 3d day of the disease and the severe fall of glutamate concentration (in spite of its initial increase on the 1st day).

Acute Disease↗
PubMedDate not supplied

Levels of neurotransmitter amino acids in the cerebrospinal fluid of patients with acute ischemic insult.

The dynamics of excitatory (glutamate, aspartate) and inhibitory (GABA, glycine) neurotransmitter amino acid contents in the cerebrospinal fluid were studied in 110 patients with hemispheric ischemic insult. These studies revealed significant increases in the levels of glutamate and aspartate in the first six hours of illness, and the level and duration of these changes correlated with the severity of the insult. Peak GABA and glycine levels were seen at the end of the first day after strokes, reflecting the delayed activation of the mechanisms of protective inhibition. The insufficiency of GABAergic mediation in strokes located in the hemispheres to a significant extent mirrored the severity of clinical features and the potential of restorative processes. Early significant biochemical criteria were identified for objective assessment of the severity of brain ischemia, and these had prognostic value for the course and outcome of strokes. The most unfavorable prognostic signs were the presence of low (or undetectable) GABA levels in the first days after insult and progressive increases in aspartate levels to the third day on the background of sharp reductions in glutamate levels (after initial elevation on the first day).

Aspartic Acid↗